Investigate ws-client possibilities in IoT

[haerdib]

A no_std, efficient ws-client seems nearly impossible. But maybe that's not even necessary, as internet connected hardware devices most likely have their own websocket implementations / libraries / necessities. Like intel sgx does.

The following needs to be done in this issue:

• investigate feasibility of some commonly known IoT devices
• Document the possible use-case(s) somewhere visible (Wiki? Readme?)
  • sgx (see worker / tungstenite-sgx-fork)
  • output of investigation above

[haerdib]

Connected to #279

[haerdib]

Just checked: Arduino Uno is a no_std embedded device, which seems to be already commonly used in the Rust world. There are several guides for Rust on Arduino.
(E.g. https://dev.to/creativcoder/how-to-run-rust-on-arduino-uno-40c0)

I think that could be a good example for this use-case.

What do you think @masapr ?

[haerdib]

Two other embedded devices that support rust / have libraries developed to support rust and do not support std

• STM32
• Nordic nrf9160